component
LM431AIZ
Public Made by Adomby adom
Texas Instruments Voltage Reference, TO-92-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownLM431AIZ
Texas Instruments · Voltage Reference · TO-92-3
LM431AIZ from Texas Instruments, in a TO-92-3. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | Cathode | bidirectional | Shunt current/output voltage pin; the datasheet limits cathode voltage to 37 V and continuous cathode current to -10 to 150 mA absolute maximum, with 1 to 100 mA recommended. |
| 2 | Reference | input | Reference pin for setting the adjustable output voltage (VREF is 2.5 V typical per the device description), with reference input current limited to 10 mA absolute maximum. |
| 3 | Anode | power_in | Anode pin, normally grounded; the datasheet lists it as an output (O) type, but it is classed here as power_in because it is the normally grounded common terminal. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | TO-92-3 |
| Category | Power Management (PMIC) |
| Pins | 3 |
CAD (KiCad official)
- Symbol:
LM431AIZ - Footprint:
Package_TO_SOT_THT:TO-92_Inline - 3D model: TO-92-3 (KiCad packages3D, STEP)
- 3D model files:
lm431aiz-etched.step/lm431aiz-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm431aiz.step/lm431aiz.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (37 pp, sha256
9c0bcff4967eaad2, retrieved 2026-10-08, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).